US5605343A - Gripping jaw - Google Patents

Gripping jaw Download PDF

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Publication number
US5605343A
US5605343A US08/474,381 US47438195A US5605343A US 5605343 A US5605343 A US 5605343A US 47438195 A US47438195 A US 47438195A US 5605343 A US5605343 A US 5605343A
Authority
US
United States
Prior art keywords
chuck
jaw holder
jaw
block
holder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/474,381
Other languages
English (en)
Inventor
Jacques Barbieux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik Tobler SA
Original Assignee
Sandvik Tobler SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandvik Tobler SA filed Critical Sandvik Tobler SA
Assigned to SANDVIK TOBLER S.A. reassignment SANDVIK TOBLER S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BARBIEUX, JACQUES
Application granted granted Critical
Publication of US5605343A publication Critical patent/US5605343A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/18—Chucks with simultaneously-acting jaws, whether or not also individually adjustable pivotally movable in planes containing the axis of the chuck
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/18—Pivoted jaw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/25—Compensation for eccentricity

Definitions

  • FR-A-2 373 351 discloses a chuck in the body of which there slides axially a traction rod that acts on a transmission system which converts the axial translation of this rod into a radial translation in terms of each jaw holder. These latter are provided with lateral flat bars which interact with flat bars recessed in the body in such a fashion as to guide the radial sliding of the jaw holders.
  • each jaw holder can swivel axially only very slightly, which means that the jaws are often only imperfectly moulded to the shape of the piece they are required to chuck.
  • an object of the invention is a chuck providing a precise radial guidance of the jaw holders in the body of the chuck and, in addition, providing freedom of axial swivelling of the latter in order to obtain optimal positioning of the jaws in contact with the piece to be chucked.
  • the invention more specifically relates to a gripping jaw having:
  • each jaw holder is fitted with a guiding member guided radially along a groove recessed in the chuck, the said guiding member being uniquely free to swivel axially in relation to the jaw holder.
  • this member thus enables the aforesaid objectives to be achieved by providing precise radial guidance of the jaw holder and enabling the latter to swivel on its axis.
  • FIG. 1 is a representation of a chuck corresponding to the invention, and comprising three jaws, according to a section passing through the axis of the body and a jaw holder;
  • FIG. 2 is an enlargement of a part of FIG. 1;
  • FIG. 3 is the front view of a guiding flange corresponding to the invention.
  • FIG. 4 is a detail in cross section according to line IV--IV in FIG. 1;
  • FIG. 5 represents a variant embodiment of the invention.
  • this invention relates to a chuck designated as a unit by the reference 1, and which is furnished with three jaws 2 respectively spaced at angles of 120°, each mounted on a jaw holder 3.
  • the chuck comprises a body 4 at the rear of which is fixed a plate 5, and in which a traction rod 6 is able to slide axially as shown by arrow 22 to force and end 26 of the jaw holder 3 into radial translation as shown by arrow 24.
  • the transmission of the motion is effected by means of a transmission system comprising a plate cam 7 and a bearing part 8.
  • the plate cam is mounted on the traction rod 6 and presents a flat and somewhat oblique, lower, beating surface 9.
  • the bearing part 8 consists of a truncated spherule presenting a fiat surface interacting with the bearing face 9 of the plate cam. This spherule 8 is housed in a scalloped recess in the jaw holder 3.
  • FIGS. 2 and 3 show more precisely, a guiding flange 10 performing the function of a guiding member, is slidingly arranged around the journal 11 of the jaw holder.
  • this flange 10 consists of a thin disk 12 presenting a cavity 13 at its center, the dimensioning of which corresponds to those of the journal 11.
  • the flange is moreover truncated from the front view according to two parallel planes D 1 AND D 2 and, in cross section, presents three faces (F 1 , F 2 , F 3 ) in relief, i.e., the three faces F 1 , F 2 , F 3 are inclined relative to the plane of the disc 12.
  • a groove 14, recessed in the plate 5 fixed at the rear of the body 4 of the chuck 1, extends axially a little beyond the extremity of the flange 10 opposite the location of the jaws 2. Viewed from the front, as shown in FIG. 4, this groove consists of two portions of circle C 1 and C 2 , so that the surface defined by the groove corresponds to the travel of the flange between the two extreme positions P 1 and P 2 .
  • each jaw 2 is itself able to swivel axially, in order to best adapt to the surface of the piece to be held, which avoids statically overdefined clamping.
  • the repositioning of the jaw holder 3 in the unclamped position is effected by means of a return shaft 15 which bounds the motion of the jaw holder 3 as shown in FIG. 1. In the unclamped position, there is minimal play between the jaw holder and the shaft, their contact surface being flat.
  • journal 11 of the jaw holder 3 In the eventuality of the centrifugal effect being offset by the flange 10, it would be possible for the journal 11 of the jaw holder 3 to be fitted with a block 16, as shown in FIG. 5. From the front view, this latter presents a conformation similar to that of the flange 10. On the other hand, to increase its mass, it possesses much larger axial dimensions, so that it extends beyond the extremity of the journal opposite the jaw holder.
  • a through cavity 17 is recessed in the block 16, so that the internal surface 18 of the block 16 comprises a portion 18 1 designed to interact with the journal 11 of the jaw holder 3, and a portion 18 2 allowing the passage of fixing means 19. These latter are necessary to prevent the block from becoming detached from the jaw holder 3. Nevertheless, it is preferable for them to be axial play J and J' between the internal surface 18 of the block and the fixing means 19, in order to allow better swivelling of the of the jaw holder in relation to the block.
  • the block 16 is able to be translated in the groove 20 recessed in the chuck.
  • the groove 20 extends axially a little beyond the extremity of the block, and presents, from the front view, a conformation which enables the block to be guided between a high position and low position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Clamps And Clips (AREA)
US08/474,381 1994-06-07 1995-06-07 Gripping jaw Expired - Fee Related US5605343A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9406935A FR2720670B1 (fr) 1994-06-07 1994-06-07 Mandrin de serrage à mors.
FR9406935 1994-06-07

Publications (1)

Publication Number Publication Date
US5605343A true US5605343A (en) 1997-02-25

Family

ID=9463947

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/474,381 Expired - Fee Related US5605343A (en) 1994-06-07 1995-06-07 Gripping jaw

Country Status (6)

Country Link
US (1) US5605343A (de)
EP (1) EP0686449B1 (de)
JP (1) JPH0847808A (de)
DE (1) DE69502235T2 (de)
ES (1) ES2117365T3 (de)
FR (1) FR2720670B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6036197A (en) * 1997-09-09 2000-03-14 Sandvik Tobler S.A. Device for clamping and driving a pre-positioned work piece
EP1127642A2 (de) * 2000-02-19 2001-08-29 Röhm GmbH Andrin à levier
EP1138421A2 (de) * 2000-02-07 2001-10-04 Howa Machinery, Ltd. Spannfutter für Werkzeugmaschine
US20030160400A1 (en) * 2002-02-22 2003-08-28 Rohm Gmbh Ball-bolt chuck
US20040169342A1 (en) * 2001-07-18 2004-09-02 Tamio Nishimiya Chuck with pull-in function

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792235B1 (fr) * 1999-04-15 2001-06-01 Sandvik Tobler Mandrin de serrage a six bras sur rotule, palonnes deux a deux
ATE448895T1 (de) 2007-09-27 2009-12-15 Smw Autoblok Spannsysteme Gmbh Kraftspannfutter
JP5861835B2 (ja) * 2012-06-13 2016-02-16 豊和工業株式会社 チャック
JPWO2019167927A1 (ja) * 2018-02-27 2021-02-04 株式会社北川鉄工所 チャック

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069181A (en) * 1961-08-03 1962-12-18 Woodworth Co N A Chuck
US3365206A (en) * 1965-01-07 1968-01-23 Woodworth Co N A Work holding chuck
FR2373351A1 (fr) * 1976-12-09 1978-07-07 Tobler Meca Precision Franco S Mandrin de serrage a mors
US4570950A (en) * 1984-06-27 1986-02-18 Morawski Longine V Compensating chuck
EP0251266A2 (de) * 1986-07-04 1988-01-07 AUTOBLOK S.p.A. Automatisch zentrierendes und positionierendes Spannfutter
US5184833A (en) * 1992-01-02 1993-02-09 Kenneth Cross Power chuck

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069181A (en) * 1961-08-03 1962-12-18 Woodworth Co N A Chuck
US3365206A (en) * 1965-01-07 1968-01-23 Woodworth Co N A Work holding chuck
DE1502035A1 (de) * 1965-01-07 1969-10-16 Woodworth Co N A Spannfutter mit Schwenkarmen
FR2373351A1 (fr) * 1976-12-09 1978-07-07 Tobler Meca Precision Franco S Mandrin de serrage a mors
US4570950A (en) * 1984-06-27 1986-02-18 Morawski Longine V Compensating chuck
EP0251266A2 (de) * 1986-07-04 1988-01-07 AUTOBLOK S.p.A. Automatisch zentrierendes und positionierendes Spannfutter
US5184833A (en) * 1992-01-02 1993-02-09 Kenneth Cross Power chuck

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6036197A (en) * 1997-09-09 2000-03-14 Sandvik Tobler S.A. Device for clamping and driving a pre-positioned work piece
EP1138421A2 (de) * 2000-02-07 2001-10-04 Howa Machinery, Ltd. Spannfutter für Werkzeugmaschine
US6474658B2 (en) * 2000-02-07 2002-11-05 Howa Machinery, Ltd. Chuck for machine tool
EP1138421A3 (de) * 2000-02-07 2003-10-01 Howa Machinery, Ltd. Spannfutter für Werkzeugmaschine
EP1127642A2 (de) * 2000-02-19 2001-08-29 Röhm GmbH Andrin à levier
EP1127642A3 (de) * 2000-02-19 2003-08-13 Röhm GmbH Andrin à levier
US20040169342A1 (en) * 2001-07-18 2004-09-02 Tamio Nishimiya Chuck with pull-in function
US7311312B2 (en) * 2001-07-18 2007-12-25 Kabushiki Kaisha Kitagawa Tekkosho Chuck drawing a work against the chuck-face
US20030160400A1 (en) * 2002-02-22 2003-08-28 Rohm Gmbh Ball-bolt chuck
US6837499B2 (en) * 2002-02-22 2005-01-04 Rohm Gmbh Ball-bolt chuck

Also Published As

Publication number Publication date
EP0686449A1 (de) 1995-12-13
ES2117365T3 (es) 1998-08-01
DE69502235D1 (de) 1998-06-04
JPH0847808A (ja) 1996-02-20
FR2720670B1 (fr) 1996-08-09
EP0686449B1 (de) 1998-04-29
DE69502235T2 (de) 1998-12-10
FR2720670A1 (fr) 1995-12-08

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SANDVIK TOBLER S.A., FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BARBIEUX, JACQUES;REEL/FRAME:007661/0677

Effective date: 19950522

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 20010225

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362